* tike64 <[EMAIL PROTECTED]> wrote: > Steven Rostedt <[EMAIL PROTECTED]> wrote: > > Also, have you tried this with a nanosleep instead of a select. > > Select's timeout is just that, a timeout. It's not suppose to be > > accurate, as long as it doesn't expire early. The reason I state > > this, is that select uses a different mechanism than nanosleep, and > > that can indeed affect the jitter. > > Ok, understood; I tried this: > > t = raw_timer(); > ts.tv_nsec = 5000000; > ts.tv_sec = 0; > nanosleep(&ts, 0); > t = raw_timer() - t; > > It is better but I still see 8ms occasional delays when listing > nfs-mounted directories onto FB. And, what is funny, also this version > makes the average delay 20ms as if it made the jiffy 20ms.
ARM has no high resolution timers support yet in the -rt tree. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/